CPC Subgroup
G01B 9/021 using holographic techniques
Full Title
Measuring instruments characterised by the use of optical techniques > Interferometers > using holographic techniques
4 direct subcodes
Child Classifications
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- G01B 9/023 for contour producing (G01B9/025 - G01B9/029 take precedence)
- G01B 9/025 Double exposure technique
- G01B 9/027 in real time
- G01B 9/029 by time averaging
Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382